<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>CSS Reference: z-index (option B)</title>
    <link rel="author" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact"/>
    <link rel="author" title="Mozilla Corporation" href="http://mozilla.com/" />
<style type="text/css">
.container {
  z-index:0;
  position: relative;
  height: 200px;
  width: 200px;
  font-size: 0;
  line-height: 0;
  background: silver;
  border: solid white;
}
.container div {
  height: 80px;
  width: 80px;
  padding: 10px;
}

.control .outline {
  border: solid fuchsia 5px;
  width: 110px;
  height: 85px;
  padding: 0;
}

.outline.c1 {
  margin: 30px 5px 100px;
}
.outline.c2 {
  padding: 0;
  margin: -20px -45px;
}
.outline.c2 > div {
  margin: -20px 5px 0;
}

.control div {
  margin-left: -35px;
  margin-top: -35px;
}
.control > div {
  margin-left: auto;
  margin-top: 100px;
}
</style>
</head>
<body>

<div class="control container">
  <div style="background: navy">
    <div style="background: blue">
       <div style="background: aqua">
         <div class="outline c2">
           <div style="background: lime">
             <div style="background: teal">
             </div>
           </div>
         </div>
      </div>
    </div>
  </div>
</div>

<p>The pattern above must match one of the two patterns below.</p>

<div class="control container">
  <div style="background: navy">
    <div style="background: blue">
       <div style="background: aqua">
         <div style="background: lime">
           <div style="background: teal">
             <div class="outline c1">
             </div>
           </div>
         </div>
      </div>
    </div>
  </div>
</div>

<div class="control container">
  <div style="background: navy">
    <div style="background: blue">
       <div style="background: aqua">
         <div class="outline c2">
           <div style="background: lime">
             <div style="background: teal">
             </div>
           </div>
         </div>
      </div>
    </div>
  </div>
</div>

</body></html>
